Noted: It need wind up to 55(No more than 55), DON'T tune to 0, turning counterclockwise from 0 will damage the mechanism.The mechanical timer has no battery, every time you need wound first, just wind it all the way once to 55 (No more than 55) BE SURETO READ AND FOLLOW THE DIRECTIONS FOR SETTING IT: turn clockwise to 55 minutes, then counter clockwise to set desired time. The timer must be wound manually. Mechanical movement inside, each machine is handmade. Cute Dog Shape: Great for kitchen lover, not only a dial timer, but a Home Decor, you will love this cute and func tionality friend.it has a certain +/-5% timing deviation,. ABS-Smooth Touch: All the interface with careful polishing with no sharp spot, cute thing to put it in the room,office,kitchen. Manage your time: Help you to learn time management, especially for cooking,baking,brush teeth,reading, learning, running, yoga,mask beauty, coffee tea time etc. Great gift to family,friend.